Make sure that Use same settings as my incoming mail server is selected.

Click the Advanced tab:

Under Incoming Server (POP3), select the This server requires an encrypted connection (SSL) checkbox. The number in the Incoming Server (POP3) field usually changes automatically from 110 to 995. If it doesn’t, type 995.

If you want to save your Yahoo! Mail messages on both the Yahoo! Mail server and on your computer, select the Leave a copy of messages on the server checkbox. If you want your messages to be deleted from the Yahoo! server once Outlook has downloaded them onto your computer, leave the box unchecked.Note: After your messages are deleted from the server, we cannot retrieve them.

Click OK to close the Internet E-mail Settings dialog box.

Click Finish to close the Add New E-mail Account dialog box.

Click Close to close the Account Settings dialog box.

Troubleshooting tips

If you still can’t send Yahoo! Mail from Outlook, you might be accessing the Internet through an ISP that is blocking the SMTP port. If this is the case, try using port 587 when sending email via Yahoo!’s SMTP server. To make this change: